A quantitative analysis of the trouton-noble experiment

We analyse quantitatively, in the frame of the usual relativistic theories of continuum media and electrodynamics, a simplified version of the Trouton-Noble experiment. It is checked at first, in thev 2/c2 approximation as well as in the exact form, that the negative result of the experiment is a consequence of the application of the angularmomentum theorem to the electromagnetic subsystem. An analogous result is obtained when analysing the mechanical subsystem. The apparent paradox can be also explained by considering the angularmomentum conservation law of the closed total system. Finally, energy considerations of the closed total system lead, obviously, to the same conclusion.